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Reversible Data Embedding Using a Difference Expansion Adviser:Pro.Yu-Chiang Li Speaker: Yi-Lun Chen DATE:2014/06/26 Author: Jun Tian Data Source: IEEE Transactions on Circuits and Systems for Video Technology, Vol.13, No.8, pp.890896, 2003. 南台科技大學 資訊工程系 Outline 2 1 Introduction 2 Background 3 Materials & Methods 4 Experiments and Result 5 Conclusion Materials & Methods(2/12) Difference Expansion(DE)嵌入資料 差值 ℎ轉成二進制 5(10) → 101(2) 將嵌入位元b放到h值的最低位元 ℎ′ = 1011(2) = 11(10) 得 ℎ′ = 2 × ℎ + 𝑏 3